Process for producing decorative effects



Sept. l0, 1929. c. BURDICK PRocEss FOR PEoDUcmE` DECORATIVE EFFECTSOriginal Filed March 5, 1926 AWR/Vey division of an application filed byPatented sept. 1o,` 1929.

4UNITED STATES CHARLES LAURECE BURDICKVOF `LONDON', ENGLAND.

PROCESS FOR PRODUCING- DECOIRMA'IFIVIE EFFECTS.

Original application led March 5, 1926, Serial No. $12,623, and in GreatBritain March 30, Divided and this application filed January 27, 1927.Serial No. 164,053.

My invention relates to a process for die tributing liquids bycompressed air for certain decorative effects, and to the productthereof, the present .application being a v me March 5, 1926, Serial No;92,623.

Ordinary .sprays which are used for distributingpaints, colours,varnishes and they like are designed to produce a very completeatomization completely covering the surface; the main object of myinvention is to distribute liquids with little or no atomization and toproduce lines or splashes, or both with regularity but without setdesign.

The viscosity of the liquid will to some extent determine the characterof the results produced, but to ensure regularity (which is a veryimportant factor for decorative effects) with any particular liquid, Ihave invented a new process whereby it is possible to obtain peculiardecorative effects by spraying.

The main peciall designed to carry out this. rocess form t e sub]ect ofm aforesaid app ication Serial No. 92,623. n the present processcompressed air impinges from several directions upon a' jet of somewhatviscous liquid in separate jets or zones of comparatively high velocityor pressure to draw it out into lines and splashes, as opposed to theordina accoinp ished evenly over a surface by dividing or atomizing theliquid as completely as possible.

'Ihe invention comprises the process and product which are describedwith reference to the accompanying drawings whereof the novel featuresor combinations are pointed i out in the claims.

face treated thereby, showing how the liquid` falls uponthe surface instrings and splashes.

Fig. 3,2is a sectional elevation to anenlarged scale of the nozzlearrangement.

features of the apparatus es-y arrangements in which painting is dle 1and a trigger 2 for controlling the y supply of liquid and compressedair. The liquid is contained in a reservoir 3 sup orted upon aconnecting pipe 4 through w ich it is fed to the liquid nozzle 5.Compressed air is supplied to the connection 6 and through the handle 1and air supply passage 7. A branch pipe 8 leads from the passage 7 toareducing valve 9 by means of which the air in the interior of theliquid reservoir is maintained at a predetermined or adjustablepressure. The cover 10 of the reservoir is suitably clamped down -byscrew 11, or the reservoir is otherwise made pressure-tight for this purose. Alternatively the presssure-feed of the liquid may be obtained bythe head "of liquid,- the reservoir then being preferably fixed at asuitable height and flexibly connected to the apparatus.

For the control of the liquid at the delivery port or nozzle 5 I employythe usual pin valve 12 which would be manipulated by a lever, preferablythe usual finger lever 2 designed to control both the air valve and thepin valve.

The delivery port for the air, surrounds the liquid discharge port ,5,but in place of the usual construction designed for only a narrow airpassage around the liqu 1d d1s charge port I provide a series'ofopenings` 13 so that the air will be divided up into a number of jets,which, impinging' on the liquid from different radial points tend todraw out the liquid in lines and splashes.

It is very important, however, to secure a uniform current of air aroundthe dischar e tip, and A,to effect this I provide within t e air cap ornozzle -an equalizing compressed air chamber 14 and a series of inneroutlets from this, which delivers the air to the outer ports at apractically uniform pressure for each port all round the liquiddischarge port. Slight clearances 15, 15 where the nlpple 16 and cap 1,7are connected also assist in pressure equalization and distribution ofthe compressed air at the outlet.L u The separate jets emerging from tleorlfices 13 all strike the li uid jet separatelytended so as to form anannular port 18 sur-l rounding the vliquid delivery nozzle, but in suchacase the area of the port 18 must be comparatively very large, as theseparate air jets mustnot be permitted or caused to merge into a uniformannular jet, but must in all cases remain as air-pressure zones. f

The compressed air may be supplied to the apparatus shown at a pressurein the neighbourhood of 20 to 30 lbs. per square inch, but the pressurein eachcase will of course depend upon the design of the apparatus andthenature of the liquid. Using a liquid of the nature of a varnishpaint, the reducing valve 9 might be set to give a pressure in theneighbourhood of 10 lbs. per square inch. In operation the liquidemerging from the nozzle is drawn out b the converging streams of airinto threas or strings which fall upon the surface being treated withsurprisingly uniform decorative eiect'but in a peculiar vdiversity ofthickness and arrange- ,ment as roughly indicated in Fig. 2.

The same surface may be treated iirst with liquid'of one colour andsubsequently with a different colour or different colours and a varietyof effects may thus be. obtained for many diierent purposes. It isto beunderstood that the expression air includes all suitable gases orgaseous mixtures.

The present application 1s .limited to the process and product claimed,the' orm 'of apparatus illustrated and serving to carry out the processforming the subject matte of copending application Serial No. 92562 Inusing the apparatus shown or similar apparatus, the operator swings thenozzle from side toside moderately quickly at the same time moving itdown or along the surface to be decorated, and very little practiceindeed is required to obtain sufiicientuniformity in the amount ofdecoration applied to each unit of area. At the same time, there is nofor- 55' mal pattern or repeat and there is thus no tendency for vthedecoration tobecoin'e monotonous.

I claim 1. A rocess of producing decorative efects w ich consists incausing compressed air delivered as independent jets to impinge fromnumerous directions in air-pressure zones upon a jet -of somewhatviscous Huid to draw and tear it out into threads and distribute is'upona surface.

A process of producing decorative elffects which consistsl in causingcompressed air to impinge from numerous dlrections in symmetricallyarranged independent air-` pressure zones upon a jet of somewhatviscousV iiuld to draw and tear it out into threads and distributeitupon a surface.

3. A process of producing decorative efy fects which `consists incausing 4compressed air to impinge from numerous directions in the formof se arate jets upon a jet of somewhat viscous uid pigment to draw andtear it out into threads and distribute them upon a surface in linesandvsplashes, and permitting the pigment to harden upon the surface.

4.A' process of producing decorative effects which consists in causingcompressed symmetrically arranged separate jets upon a 'jet of somewhatlviscous fluid pigment to draw and tear it out into threads anddistribute them upon a surface in lines and splashes, and permitting thepigment to harden upon the surface.

In testimony whereof I ahix my signature.

CHARLES LAURENCE BURDICK.

' air to impinge from' numerous directions in

